National Forecast
Issued at: 21 January 2026 04:30
TODAY - Wednesday 21st January
Rain will extend across Munster and southern parts of Leinster and Connacht early this morning, while further north there'll be scattered showers and some sunny spells. The rain will become widespread through the late morning and afternoon and will continue in the north and east into the evening, while a clearance to showers develops in other areas. Turning breezy with moderate to fresh and gusty easterly winds, occasionally becoming strong. Highest temperatures of 5 to 10 degrees. A combination of spring tides and onshore winds may result in coastal flooding, particularly at high tide along the south and east coasts.
TONIGHT
Rain will be mainly confined to the north and east early tonight, with scattered showers and some clear spells elsewhere. It will becoming mainly cloudy overnight with showery rain affecting most areas. The rain will turn heavy at times, particularly in the south. Areas of mist and fog will form too. Lowest temperatures of 1 to 8 degrees, coldest in the southwest where most clear spells will occur. Moderate to fresh easterly winds in Ulster but mainly light and variable elsewhere.
TOMORROW - Thursday 22nd January
Tomorrow will be mostly cloudy and misty with outbreaks of rain, turning heavy at times. The best of any sunny spells will be in the southwest. Highest temperatures of 5 to 9 degrees with light to moderate and variable winds, occasionally fresh in Ulster.
National Outlook
Thursday night: Rain will clear northwards early on Thursday night, leaving scattered showers and clear spells, however areas of mist and fog will develop. Moderate to fresh easterly winds in Ulster at first, but otherwise winds will be light and variable. Lowest temperatures of -2 to +3 degrees, coldest in Munster.
Friday: Cloud and patchy rain or drizzle will develop in the south on Friday morning and will spread northwards through the day, with clear spells and showers following in the south during the evening. Becoming breezy with moderate to fresh easterly winds. Highest temperatures of 5 to 9 degrees.
Friday night: Cloudy with patchy light rain or drizzle in northern areas and showers near the south coast. Dry with clear spells across the centre of the country. Lowest temperatures of 4 to 8 degrees with a moderate to fresh easterly breeze.
The Weekend: There is some uncertainty in the forecast for the weekend but current indications are for patchy rain or showers at times but also some drier and brighter intervals. Breezy on Saturday with moderate to fresh easterly winds but becoming calmer on Sunday. Highest temperatures of 5 to 9 degrees.
Outlook for next week: Low pressure is forecast to remain in charge, bringing generally unsettled conditions. Potentially turning cooler early next week.
Temperature circle (°C): maximum and minimum temperature forecast for each day. Wind symbol (km/h): arrow points in the direction the wind is blowing. The weather and wind icons: for the time of maximum temperature and minimum temperature.